SP1486E Datasheet, PDF (1/15 Pages) Sipex Corporation – +5V, 20Mbps PROFIBUS RS485/RS422 Transceivers Advanced Failsafe, 1/8th Unit Load, ±15kV ESD-Protected

SP1486E
+5V, 20Mbps PROFIBUS RS485/RS422 Transceivers
Advanced Failsafe, 1/8th Unit Load, ±15kV ESD-Protected
FEATURES
• Recommended for PROFIBUS applications
• High differential output drive,
minimum 2.1V into 54Ω load
• 5.0V Single Supply Operation
• 1ns driver and receiver skew
• 20 Mbps data rate
• 1/8th Unit Load, 256 transceivers on bus
• Robust ESD Protection for RS485 pins
• ±15kV Air-Gap Discharge
• ±15kV Human Body Model
• ±8kV Contact Discharge
• Hot Swap glitch protection on control inputs
• Receiver failsafe on open, short
or terminated lines
• Driver short circuit current limit and
thermal shutdown for overload protection
• Very low 300μA static power consumption
• 1μA shutdown mode
1 ^RO
RE
2
B
R
V_{CC 8}
B7
3 ^DE
D
4
DI
SP1486E
A6
GND ⁵
+5V
100nF
RT
APPLICATIONS
• High Speed RS485 Communications
• Industrial Process Control
• PROFIBUS applications
DESCRIPTION
SP1486E is a half duplex differential line transceiver suitable for high speed bidirectional commu-
nication on multipoint bus transmission lines. Each device contains one differential driver and one
differential receiver. Devices comply with TIA/EIA-485 and TIA/EIA-422 standards and also meet the
higher drive and tighter skew requirements of PROFIBUS applications. Lead-free and RoHS compli-
ant packages are available for all models.
PROFIBUS is in wide use in industrial control and automation applications and the SP1486E is rug-
gedized for use in harsh operating conditions. Receivers are specially designed to fail-safe to a logic
high output state if the inputs are left un-driven or shorted. All RS485 bus-pins are protected against
severe ESD events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge
(IEC 1000-4-2). Drivers are protected from excess current flow caused by bus contention or output
short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for
Industrial (-40 to +85ºC) operating temperature. Receivers have exceptionally high input impedance,
which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while
preserving full signal margin.
All devices operate from a single 5.0 V power supply and draw negligible quiescent power. Both driver
and receiver can be enabled and disabled independently and the device enters a low power shutdown
mode if both driver and receiver are disabled. The bus-pin outputs of disabled modules are in high
impedance state. The high impedance driver output is maintained over the entire common-mode volt-
age range from -7 to +12V.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
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SP1486E_100_061009